Improvement in machines for planing- metal



iiuiied4 time @anni @tithe Laws Poem No. 93,847, dated August '17, 1869.

IMPROVEMENT IN MAGHNESFOR PLANING METAL.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that I, ALONZO WHI'rcoMB, of Worcester, in the county of Worcester, and State of Mas' sachnsetts, have invented certain new and useful Improvements in Plauers for Metal-'Working and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had tothe accompanying drawings, 'making part of this specification, and to the letters of reference marked thereon, like letters indicating like parts wherever they occur. To enable others skilled in the art to construct and -use my invention, I will proceed to describe it.

My invention relates .to machines known as planers for working metals; and

It consists iu a novel construction of a frictionclutch for thefeed of the same, as hereinaiter more fully explained.

Figure'lis a side elevation, with a portion broken away; and

Figure 2 is a sectional view of a portion ofthe same, taken on the line a: x of fig. 1.

In the drawings- A represents the horizontal, and B, tbe upright part of the frame of a planer, these parts being constructed iu the usual manner.

Transversely under the bed A, usually extends a shaft, D, upon one end of which is secured a circular head or disk, C.

Around this disk, I secure a friction-clutch, consisting of two semicircular pieces, E, grooved en their inner face to iit the periphery of the disk C, as shown in iig. 2.

These pieces may be hinged together at their lower joint, or they may be secured together by af screw, as represented in dotted lines in ig.- -l. i

At their opposite ends, these pieces, E, are provided with radial projections, b, which have their adjoining faces cut out, so that when the two are, placed together, there shall be a V-shaped recess or cavity between them, as represented in iig. 1.

On cach side of this recess, near its inner extremity, there is left a projection, o, as shown in g. 1. v

Within the cavity thus formed, I secure a lever, Z,

which isheld therein by a screw-bolt, e, which passes through the projections or arms b on the 'pieces E; said bolt c having its head fitting loosely in a cavity in one of said arms, with a spiral spring underneath it, and passing through an elongated or enlarged opening in the lever l, which latter is thereby held' in place,

vbut is left loose to move to and fro in the cavity.

When the parts are thus constructed and applied, it will be seen that tbe spring h, tends to draw the two' sections E of the ling together, thereby causing them to Ahug the disk O with more or less force, 4according to the tension of the spring, and' that consequently, when the shaft D, with the diskO,'revolves in either Idirection, the clutch moves with it, carrying the crossbar I, which is attached to the clutch, along also; but that, whenever the lever l comes iu contact with either of the pins fn., which project from the side ofthe frame A, the lever l, operating on the projections o, as fulcra, serves to overcome the force ofspring It, and

pushes the sections E asunder, and thereby releases them of their hold on the disk C, permitting the latter to continue its movement, while the clutch or ring,` with its bar I, remains stationary.

By this arrangement, the clutch or ring will move,v with the head C, through the space between the pins n only, and in either direction, while the head itself may make any number of revolutions.

' All the other parts of the planer may be constructed in any of the usual methods,l and'tberefore need notbe herein described, as they constitute no part of my present invention.

Having thus described vmy invention,

The frictiomclutch, consisting of the partsE .E and the lever l, with the spring h, constructed and' arranged to operate substantially as described.

YALONZO XVHITCMB.

Witnesses:

ALFRED R. BRoNsoN, J. HENRY HILL. 

